Axiom Home Page Forums General Discussion Home Theater Speaker choice for 13' X 21' room

Hi,
I have an area in my basement that is going to be my HT. Dimensions are 13 feet (width) by 21 feet (length). The tv/viewing spot is going to be on one end of the 13 foot side. The room is already wired for 7.1. So now comes the speaker choice. I'm thinking of going with the following for now:

M22 for front L and R
VP100 for center
QS4 for surround L and R

I'm uncertain about the sub and not buying the rears immediately.
My question: Are my speaker choices good for the room size I have? Should i be going for the VP150 for center?

Thanks
LH